Vortex-assisted low density solvent liquid–liquid microextraction and salt-induced demulsification coupled to high performance liquid chromatography for the determination of five organophosphorus pesticide residues in fruits

Seebunrueng, Ketsarin; Santaladchaiyakit, Yanawath; Srijaranai, Supalax

doi:10.1016/j.talanta.2014.10.020

Cited by 108 publications

(39 citation statements)

References 29 publications

(36 reference statements)

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“…Pesticides were extracted from real samples based on a modified QuEChERS method . In brief, a 10 g portion of the thoroughly homogenized fruit or vegetable samples (apple, tomato, or cucumber) was transferred to a 50 mL centrifuge tube.…”

Section: Methodsmentioning

confidence: 99%

Preparation of magnetic mesoporous silica composite for the solid‐phase microextraction of diazinon and malathion before their determination by high‐performance liquid chromatography

Bazmandegan‐Shamili

Shabani

Dadfarnia

et al. 2017

J of Separation Science

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A novel magnetic mesoporous silica material was synthesized and used as the sorbent for the magnetic solid-phase microextraction of diazinon and malathion before their quantification by high-performance liquid chromatography with UV detection. The sorbent was synthesized by a surfactant-templated one-pot sol-gel procedure using SiO -coated Fe O as the magnetic support, cetyltrimethylammonium bromide as the template and tetraethyl orthosilicate as the silicon source. The characteristics of the prepared sorbent were investigated using Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. The sorbent exhibited a high maximum adsorption capacity of 19.2 and 9.4 mg/g for diazinon and malathion, respectively. The parameters affecting the microextraction were optimized by the MultiSimplex method. Under the optimized conditions, the calibration graphs were linear in the concentration ranges of 0.3-50.0 and 0.5-50 μg/L with the limits of detection of 0.09 and 0.14 μg/L for diazinon and malathion, respectively. The relative standard deviations (n = 5) at a concentration level of 10.0 μg/L of analytes were less than 2.5 and 4% for intra and interday, respectively. The developed method was successfully used for the determination of diazinon and malathion in apple, tomato, cucumber, tap water, and well water samples.

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Section: Methodsmentioning

confidence: 99%

Preparation of magnetic mesoporous silica composite for the solid‐phase microextraction of diazinon and malathion before their determination by high‐performance liquid chromatography

Bazmandegan‐Shamili

Shabani

Dadfarnia

et al. 2017

J of Separation Science

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“…However, the wide use of OPPs in agriculture can lead to the contamination of crops such as rice, vegetables, and fruits. The presence of the OPPs residues in food could endanger human health due to their high toxicity, mutagenic, and carcinogenic effects, as well as inhibition of the acetyl‐cholinesterase enzyme activity that controls the transmission of nerve impulse in human organs . Thus, it is important to develop a rapid, simple, sensitive, environmentally friendly, and easily operated analytical method for the determination of OPPs residues in food, environmental, and biological matrixes.…”

Section: Introductionmentioning

confidence: 99%

Temperature‐controlled liquid–liquid microextraction combined with high‐performance liquid chromatography for the simultaneous determination of diazinon and fenitrothion in water and fruit juice samples

Bazmandegan‐Shamili

Dadfarnia

Shabani

et al. 2018

J of Separation Science

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A simple, environmentally benign, and rapid method based on temperature-controlled liquid-liquid microextraction using a deep eutectic solvent was developed for the simultaneous extraction/preconcentration of diazinon and fenitrothion. The method involved the addition of deep eutectic solvent to the aqueous sample followed by heating the mixture in a 75°C water bath until the solvent was completely dissolved in the aqueous phase. Then, the resultant solution was cooled in an ice bath and a cloudy solution was formed. Afterward, the mixture was centrifuged and the enriched deep eutectic solvent phase was analyzed by high-performance liquid chromatography with ultraviolet detection for quantification of the analytes. The factors affecting the extraction efficiency were optimized. Under the optimized extraction conditions, the limits of detection for diazinon and fenitrothion were 0.3 and 0.15 μg/L, respectively. The calibration curves for diazinon and fenitrothion exhibited linearity in the concentration range of 1-100 and 0.5-100 μg/L, respectively. The relative standard deviations for five replicate measurements at 10.0 μg/L level of analytes were less than 2.8 and 4.5% for intra- and interday assays, respectively. The developed method was successfully applied to the determination of diazinon and fenitrothion in water and fruit juice samples.

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“…To our knowledge, during the past few decades, a variety of methods, including GC/MS, HPLC, immunoassay, quantum dot-based molecularly imprinted polymers (QD-MIP), colorimetric methods, and photoelectron-chemical sensors, [7][8][9][10][11][12][13][14][15][16][17][18] have been developed for the detection of OPs. However, most of them suffer from some disadvantages, such as sophisticated instrumentation, complicated specimen preparation, time-consuming operation, poor stability and unsatisfactory sensitivity and these shortcomings make them inadequate for rapid on-site detection.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and sensing applications of a new fluorescent derivative of cholesterol

et al. 2016

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A fluorescent 4-chloro-7-nitro-1,2,3-benzoxadiazole (NBD) derivative of cholesterol (CTN) was designed and synthesized. The compound forms a 1 : 1 non-fluorescent complex with Hg 2+ in a solvent mixture of water and ethanol. Based on this discovery, a detection method with a detection limit (DL) of B0.08 mM for Hg 2+ was developed. The presence of other commonly found metal ions has little effect on the detection. Though Fe 2+ and Cu 2+ have some interference, it could be avoided by a simple oxidation or reduction procedure. Further studies revealed that the complex can be used for the turn-on detection of some organophosphorus pesticides (OPs), such as DDVP, glyphosate, chlorpyrifos, diazinon and phoxim, either in solution or film state. The DLs for the five OPs are 0.015, 0.018, 0.087, 0.098 and 0.113 mg mL À1 in solution, respectively. In addition, the compound as developed is interesting and attractive because it can sense the heavy metal ion and the OPs in a fast and sensitive manner. It is therefore believed that the developed method possesses the potential to be used for rapid on-site detection of hazardous chemicals.

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Vortex-assisted low density solvent liquid–liquid microextraction and salt-induced demulsification coupled to high performance liquid chromatography for the determination of five organophosphorus pesticide residues in fruits

Cited by 108 publications

References 29 publications

Preparation of magnetic mesoporous silica composite for the solid‐phase microextraction of diazinon and malathion before their determination by high‐performance liquid chromatography

Preparation of magnetic mesoporous silica composite for the solid‐phase microextraction of diazinon and malathion before their determination by high‐performance liquid chromatography

Temperature‐controlled liquid–liquid microextraction combined with high‐performance liquid chromatography for the simultaneous determination of diazinon and fenitrothion in water and fruit juice samples

Synthesis and sensing applications of a new fluorescent derivative of cholesterol

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